The Zhitong Finance App learned that 2024 is about to come to an end. Major projects in Shandong Province, a major “15th Five-Year Plan” increase — major happy news came from a gold mine kilometer underground in Laizhou Ruihai Mining Co., Ltd. The two TBMs were successfully assembled and commissioned ahead of schedule, and are ready to go.

A new journey

Important historical points in project construction

At 9:36 a.m. on December 30, former guests of Ruihai Mining Co., Ltd. gathered, colorful balls fluttered, and flags hunted. Twelve giant slogans were unveiled, and the launch ceremony of the two TBMs was grandly unveiled. Yu Minghai, general manager of Ruihai Mining, Huang Dexiang, vice chairman of Zhejiang Tunnel, and Jiang Guipeng, chairman of Zhaojin Mining (01818), delivered speeches and speeches. At 10 a.m., with Qiu Zhaoming, Vice Mayor of Laizhou Municipal Government, announcing that the “Haiyue 1” and “Haiyue 2” TBMs of Laizhou Ruihai Mining Co., Ltd. will depart! Qiu Zhaoming, Deputy Mayor of Laizhou Municipal Government, Jing Xingye, Deputy Mayor of Zhaoyuan Municipal Government, Wang Le, Vice Chairman and General Manager of Zhaojin Group, Jiang Guipeng, Chairman of Zhaojin Mining, and other guests jointly pressed the launch ball. The ceremony ended successfully.

At the ceremony, more than 100 guests from the Laizhou Municipal Government, Zhaoyuan Municipal Government, Zhaojin Group, construction units, and construction units witnessed this important moment. They all said that the speed of construction of the offshore gold mine is changing rapidly and is amazing. This time, the simultaneous launch of the two TBMs was even more shocking, making people truly appreciate the implementation of first-class construction standards. Construction and construction unit personnel said, “We are all very excited today. With the help of this powerful tool, we have more confidence in the construction of offshore gold mines, and the completion of the project is just around the corner.

New equipment leads a new journey. The successful application of the TBM equipment process brought the offshore gold mine project to an important historical juncture, marking the overall acceleration of project construction, on the “fast track”, and rapid and efficient progress towards the goal of completion and production.

milestones

First application of kilometer-deep wells in gold mines around the world

“How are preparations for Haiyue 1 and Haiyue 2?”

“Haiyue No. 1, preparations are complete, please give instructions!”

“Haiyake No. 2, preparations are complete, please give instructions!”

“Follow my instructions. The countdown from Haiyue 1 and Haiyue 2 is 5 seconds. 5, 4, 3, 2, 1. Departure!”

At 10:36 a.m., the -1060m and -1285m TBM motors roared, rotated, and started at full speed, sounding a new trumpet for Ruihai Mining's offshore gold mine construction. Moments later, as the conveyor belt delivered the first batch of excavated rock slag, there was thunderous applause at the scene. Vice Mayor Qiu Zhaoming of the Laizhou Municipal Government and Vice Mayor Jing Xingye of the Zhaoyuan Municipal Government offered congratulations on behalf of the Laizhou Municipal Committee and Municipal Government, and proposed that the successful application of TBM should be used as an opportunity to keep an eye on major project promotion requirements, further accelerate the pace of construction, and strive for early completion and production.

As a major heavy equipment, TBM is not only a representative of the level of technology, but also a demonstration of technological strength. The development, introduction, and simultaneous launch of the two TBMs in the Ruihai Mining Offshore Gold Mine Haiyue 1 and 2 are the first applications for kilometer-deep wells in gold mines around the world. The equipment and process not only solved industrial problems such as high temperature, high humidity, and high halogen in deep-sea deep well engineering construction faced by offshore gold mines, but also filled the gaps in TBM mining engineering technology in domestic deep-buried metal mines. It is an important milestone in the development of the gold mining industry, and will accelerate gold mine mining towards an automated, unmanned and intelligent era.

accelerations

Project construction efficiency begins to double

Ruihai Mining's 2 TBMs are named “Haiyue 1” and “Haiyue 2,” and they actually have the hard power to cross mountains and seas. Both TBMs are double shield TBMs with an excavation diameter of 5 meters, weighing 570 tons and 700 tons respectively. Using the core technology of “large slope+continuous small turns+long tunneling distance” pioneered by the gold industry, they were selected for the Taishan Industry Leading Talent Project Pool in Shandong Province.

As the world's first undersea gold mine, the construction of Ruihai Mining's offshore gold mine faces a series of industrial and world-class technical challenges. According to information, the offshore gold mine - 1,060m, -1285m2 TBM successfully overcame deep-sea underground construction problems such as high temperature, high salt, and high ground pressure, solved technical bottlenecks such as a small radius of 80 meters, 180° large angle turns, and 15% large longitudinal slopes, and achieved important breakthroughs in gold mine mining technology from rock drills to full-section hard rock tunneling machines, which is of great significance to the technological transformation of the gold mining industry.

New technology brings new breakthroughs. The excavation efficiency of the two TBMs launched at Ruihai Mining's offshore gold mine this time will increase by more than 4 times compared to traditional drilling and blasting construction methods, truly helping the offshore gold mine construction to “accelerate”.

Exceed expectations

Make every effort to build a world-class mine

The construction position of Ruihai Mining's offshore gold mine project is to build a world-class green, safe and intelligent high-standard mine. The goal is to build a world-class single gold mine with a daily processing scale of more than 12,000 tons and an annual output of at least 15 tons of gold.

Since the launch of the project construction competition in 2022, fundraising has gathered the most advantageous resources and the best talents to unswervingly advance the project as Project No. 1; all the cadres and employees of Ruihai Mining were moved by the news and made every effort to fight the project. Up to now, a total of 4.5 billion yuan has been invested in the construction of the project. The “five vertical and one slope” have all been completed, and the construction of key facilities such as beneficiation plants and tailings depots has progressed smoothly, and the progress and results have far exceeded expectations.

Based on the enthusiastic expectations of all parties regarding the quality and progress of project construction, Ruihai Mining implemented a series of process and technological innovations, providing a practical guarantee that the construction progress of the project exceeded expectations. Facing the problems of the ultra-deep well lifting tail rope industry, Ruihai Mining pioneered domestic ultra-deep steel wire rope selection by innovating the interactive design of steel wire rope twisting and twisting in China. The main well lifting speed reached 16 m/s; it has successively implemented more than 20 technical issues of unmetered chamber loading systems and dual power supply modifications to help improve the quality and efficiency of project construction; successfully overcome technical problems such as the easy collapse of the huge loose sand layer on the surface, the risk of forming holes in complex geological conditions, and the difficulty of installing ultra-deep, large-caliber drilling pipelines. Set the record for the deepest large aperture drilling in China.

The successful launch of TBM has opened a new chapter in the construction of offshore gold mine projects, and placed higher demands on the quality and efficiency of project construction. All the cadres and employees of Ruihai Mining will make every effort to secure process management, equipment operation and project construction with a first-class mentality, first-class work style, first-class working standards, and first-class sense of innovation to ensure the efficient completion of Ruihai Mining; the Zhejiang Tunnel will build a strong construction team around construction tasks to lead the equipment manufacturer China Railway Equipment and the research unit Central South University to ensure the successful completion of the project.

The completion and production of Ruihai Mining's offshore gold mine poured out the concern and care of all provincial and municipal governments, gathered the efforts and efforts of all Ruihai builders, and carried the fervent expectations of all shareholders and funders. Zhaojin will unswervingly take the Ruihai project as the No. 1 project, continuously introduce advanced ideas and advanced technology similar to the application of TBM equipment into project construction, and make every effort to ensure the efficient construction and production of Ruihai Mining with unconventional thinking, courage and initiative, the most advanced ideas, processes and equipment, and superior construction results, and write a new blueprint for Zhaojin's multiplication and development.